Hugo bisciioff



UNITED STATES PATENT GEEICE.

HUGO BISCIIOFF, OF BERLIN, ANI) ARMAND MIEG, OF LEIPSIC, SAXONY, GERMANY.

PROJ E'oTlLE.

SPECIFICATION forming part of Letters Patent No. 394,673, dated December 18, 1888.

Application filed August 6, 1887.

- serial No. 246,251. (No model.)

T0 all whom. it muy concern:

Be it known that we, HUGO B'ISCHOFF, a subject of the King of Bavaria, and a resident of Berlin, Prussia, Germany, and AR- MAND MIEG, a subject of the King of Bavaria, and a resident of Leipsic, Saxony, Germany, have invented new and useful .Improvements in Project-iles, of which the following is a specification. s The invention relates to projectiles consisting of a hard-metal casing containing'lead or other similar material.

The object of the invention is to provide a new and improved caseprojectile having a guide-rin-gof soft metal to prevent rapid Wear of the grooves of the rifle-barrel, and at the same time to press the filling tightly into the metal casing. y

The invention consists in the construction hereinafter described, and specifically pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional elevation of a case'- projectile without a guide-ring. Figs. 2, 3, and -i are sectional elevations of case-projectiles provided wit-h guide-rings before being pressed in and illustrate various forms. Figs. 5 to 1l are sectional elevations of our improved case-projectiles, illustrating various forms; and Figs. 12 to 17 are side elevations of the same, illustrating various forms.

Case-projectiles are specially designed for small-arms, and consist of a strong hard-metal casing, a., containing afilling, b, of lead or other suitable material, as illustrated in Fig. 1. Such a project-ile, when pressed into the bore of a rifie, would naturally destroy the grooves or windings when fired throughv the same; and to obviate this objection Weprovide each projectile with one or more softmetal rings, c, which are pressed into the hard-metal casing a.. To accomplish this, we place the soft-metal ring or ringsc on the hard-metal casing a., and then place the projectile in a suitable press, of any approved construction, so that a high pressure is exerted against the soft-metal ring or rings c,

vwhich are thus forced into the hard-metal ring c rests is pressed into the lling b, which is thus pressed firmly and tightly in the casing a.. The dies for pressing the rings c into the hard-metal casing ay are of suitable shape, so as to press part of the ring c ush with the metal casing a, and at the same time leave an annular projection, c', as illustrated in, Figs. 6, 7, and 8 The dies of the press may also be of such a shape as to press the ring into conical form, as illustrated in Figs. 9 and 10; or the dies may be made of other forms of suitable cross-section. l

' It will be seen that part of the soft-metal ring c, projecting around the exterior of the hard-metal casing a., fits into the groove of the rifle-barreL'thus guiding the projectile through the barrel when fired, and, as the said ring is of soft metal, the grooves in the barrel are not injured.

In case `a spaceL is formed between the pressed-in ring c and the respective part of the hard-metal casing a., `as illustrated in Fig. 11, then the projectile receives, by means of a press, a pressure against its bottom, so that the filling b forces the respective part of the hard-metal casing a into the empty space and tightly against the ipressed-in ring c.

It will -be seen that our improved projectile, having a soft-metal ring, does not injure the grooves of the ride-barrel, and by pressing the said soft-metal ring into the hard-metal casing We force the filling material tightl into its casing. 'Y

'Having thus fully described our invention, We claim as new and desire to secure by Letters Patent# As an improved article of manufacture, a projectile consisting in a soft-metal core having a circumferential groove, a hard-metal case inclosing the sides and pointof the said core and provided with a circumferential depression, the internal ridge or shoulder formed thereby closely fitting in the said groove of the core,wand a guide-band fitting the said circumferential depression in the case and having a projecting part extending beyond the sides of the case topngage the grooves of the gun-barrel, substantially as set forth.

In. testimony whereof we have signed our names to this specification in the presence of two subscribing Witnesses.

, HUGO BISCHOFF. Witnesses: ARMAND MIEG.

- B. ROI,

` G. HLsMANN. 

